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| Mirrors > Home > MPE Home > Th. List > Mathboxes > islan2 | Structured version Visualization version GIF version | ||
| Description: A left Kan extension is a universal pair. (Contributed by Zhi Wang, 4-Nov-2025.) |
| Ref | Expression |
|---|---|
| islan.r | ⊢ 𝑅 = (𝐷 FuncCat 𝐸) |
| islan.s | ⊢ 𝑆 = (𝐶 FuncCat 𝐸) |
| islan.k | ⊢ 𝐾 = (〈𝐷, 𝐸〉 −∘F 𝐹) |
| Ref | Expression |
|---|---|
| islan2 | ⊢ (𝐿(𝐹(〈𝐶, 𝐷〉 Lan 𝐸)𝑋)𝐴 → 𝐿(𝐾(𝑅 UP 𝑆)𝑋)𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | islan.r | . . 3 ⊢ 𝑅 = (𝐷 FuncCat 𝐸) | |
| 2 | islan.s | . . 3 ⊢ 𝑆 = (𝐶 FuncCat 𝐸) | |
| 3 | islan.k | . . 3 ⊢ 𝐾 = (〈𝐷, 𝐸〉 −∘F 𝐹) | |
| 4 | 1, 2, 3 | islan 49812 | . 2 ⊢ (〈𝐿, 𝐴〉 ∈ (𝐹(〈𝐶, 𝐷〉 Lan 𝐸)𝑋) → 〈𝐿, 𝐴〉 ∈ (𝐾(𝑅 UP 𝑆)𝑋)) |
| 5 | df-br 5097 | . 2 ⊢ (𝐿(𝐹(〈𝐶, 𝐷〉 Lan 𝐸)𝑋)𝐴 ↔ 〈𝐿, 𝐴〉 ∈ (𝐹(〈𝐶, 𝐷〉 Lan 𝐸)𝑋)) | |
| 6 | df-br 5097 | . 2 ⊢ (𝐿(𝐾(𝑅 UP 𝑆)𝑋)𝐴 ↔ 〈𝐿, 𝐴〉 ∈ (𝐾(𝑅 UP 𝑆)𝑋)) | |
| 7 | 4, 5, 6 | 3imtr4i 292 | 1 ⊢ (𝐿(𝐹(〈𝐶, 𝐷〉 Lan 𝐸)𝑋)𝐴 → 𝐿(𝐾(𝑅 UP 𝑆)𝑋)𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1541 ∈ wcel 2113 〈cop 4584 class class class wbr 5096 (class class class)co 7356 FuncCat cfuc 17867 UP cup 49360 −∘F cprcof 49560 Lan clan 49792 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2706 ax-rep 5222 ax-sep 5239 ax-nul 5249 ax-pow 5308 ax-pr 5375 ax-un 7678 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2567 df-clab 2713 df-cleq 2726 df-clel 2809 df-nfc 2883 df-ne 2931 df-ral 3050 df-rex 3059 df-reu 3349 df-rab 3398 df-v 3440 df-sbc 3739 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4579 df-pr 4581 df-op 4585 df-uni 4862 df-iun 4946 df-br 5097 df-opab 5159 df-mpt 5178 df-id 5517 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-res 5634 df-ima 5635 df-iota 6446 df-fun 6492 df-fn 6493 df-f 6494 df-f1 6495 df-fo 6496 df-f1o 6497 df-fv 6498 df-ov 7359 df-oprab 7360 df-mpo 7361 df-1st 7931 df-2nd 7932 df-func 17780 df-lan 49794 |
| This theorem is referenced by: lanrcl5 49822 |
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